* CI: disable Ubuntu 16.04 as it's EOL
https://github.blog/changelog/2021-04-29-github-actions-ubuntu-16-04-lts-virtual-environment-will-be-removed-on-september-20-2021/
* main: lint false positive
* install: lint
* plugins/cmd-returned-notify: don't `export`
* plugins/xterm: lint
* plugins/git: lint
* plugins/goenv: lint
* plugins/alias-completion: lint false positives
* plugins/alias-completion: fix SC2155, SC2154
Declare `locals` at the top of the function
* completion: lint completions using `bash_completion` functions
Match the style of the existing code
* completion/knife: lint false positives
* completion/knife: lint
* completion/sdkman: lint
* completion/composer: lint
* Move `.shellcheckrc` under `themes/`
* lib/theme: fix SC2155, SC2154, SC2034
* lib/colors: don't warn on unused variables
We assign a large number of variables here and they may or may not be used anywhere else, so disable SC2034 for this file (only).
Alsö disable SC2005 as the functions in this file were written before `printf` was invented and have to do some fancy metascripting to get escape sequences interpreted reliably. I’m not smart enough to fix this to use `printf`, so leave it for now.
* themes/agnoster: lint
* themes: disable SC2154 for colors
Each one of these themes will need it’s own fix for SC2154, possibly upstream.
Due to the way themes are, it's entirely normal to have a *lot* of false positives for SC2034. So much so, that I have to admit that it is probably just not worth linting for SC2034 despite my dislike of blanket ignore rules.
* themes: disable SC2154, fix SC2155
Each one of these themes will need it’s own fix for SC2154, possibly upstream.
Due to the way themes are, it's entirely normal to have a *lot* of false positives for SC2034. So much so, that I have to admit that it is probably just not worth linting for SC2034 despite my dislike of blanket ignore rules.
* Delete `.shellcheckrc`
* remove executable bit
Fix the __powerline_duration_prompt: location & unused variable `prompt`
Remove the duration segment from powerline* theme defaults
Different color for duration prompt segment
[Toolbox](https://github.com/containers/toolbox) is an containerized
development environment. This commit adds a promot to powerline when it
is running inside a toolbox.
